Paper-making machine.



R. G. BENEDICT.

PAPER MAKING MACHINE.

APPLICATION FILED 110v. 8, 1911.

Patented July 9, 1912.

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I O 0 I 1 a A TTORNEV W/TNFSSES' a)? f teri al.

RICHARD G. BENEDICT, OF HOLYOKE, MASSACHUSETTS.

PAPER-MAKING MACHINE.

Specification of Letters Patent.

Patentee July 39, 1912,

Application filed November 8, 1911. serial No. 659,084.

T 0 all whom it may concern Be it known that I, RICHARD G. BENE- DICT, acitizen of the United States of America, residing at Holyoke, in thecounty of Hampden and State of Massachusetts, have invented new anduseful Improvements in Paper-Making Machines, of which the following isa specification.

The present invention relates to improvemerits in paper making machinesin which the pulpy mass is carried through the machine on the ordinaryFourdrinier wire.

The object of the invention is to produce sheets of paper with a portionthereof thinner than the body or rest of the sheet.

It is found desirable, in blank book making, especially of the looseleaf binder type of books, to have a portion of the paper near thebinding edge thinner than the rest of the sheet, so that this part ofthe sheet will readily fold or bend in opening and closing the book, andalso in the ordinary use of the book. By making the sheets thinner, thebound edge of the book is kept the same thickness as the rest of thebook.

A further object of the invention is to provide a mechanism which willleave the thinner portion of the paper with a finished surface so thatwriting or printed matter may be placed on both sides of this part ofthe sheet.

Prior to my invention, machines for thinning sheets of paper have beenproduced in which the thickness of the paper is effected by grinding orabrading the surface of the paper to remove a portion of the ma- Thisprocess is generally carried out after the sheet has become thoroughlydry; other processes reduce the thickness of the paper by exerting apressure on the pulpy mass during the passage of the wet pulp throughthe machine on the Fourdrinier wire, and still others effect practicallythe same result, by means of suction boxes, to extract the water fromthe pulp before it passes through the drying rolls.

These suction boxes are sometimes located above the pulp on the wire toremove some of the stock.

My invention, in general, consists in placing above the pulpy mass onthe Fourdrinier wire, and while the pulp is still in a wet state,rapidly revolving paddles that lightly strike or engage the pulp andproduce a channel in the unfinished paper, thus removing and throwingbackward from the blades of the paddle wheel small quantities of pulp,thereby reducing the quantity of the paper stock at this point in itsmanufacture. This paddle wheel construction is preferably locatedadjacent the rear ends of the deckle-straps and in front of thedandyroll. At this portion, the Fourdrinier wire of the machine haspractically no vibration, and the channel that is formed by the paddlewheel will have regular or smooth sides. After the pulpy mass leaves therapidly rotating paddle wheel it passes under a woven wire or fabricband which is located on the dandy roll, which serves the purpose ofproducing a uniform and even surface adjacent the grooved or thinnedportion of the pulp or unfinished paper.

My invention therefore relates to improvements in paper making machinesfor producing a thin portion when the paper is, in a wet state.

In the drawings forming part of this application,-Figure l is a planview of so much of the paper making machine which relates to myimprovement, and showing the paddle wheels located adjacent the rear endof the deckle straps and in front of the dandy roll. Fig. 2 is a sideelevation of Fig. 1 showing the means of supporting the rotating paddlewheels with relation to the suction boxes, dandy roll, and the decklestraps. Fig. 3 is an enlarged end view of one of the paddle wheels and aportion of the pulp on the Fourdrinier wire showing the grooves made bythe paddle wheels during the operation of the machine. Fign is a detailview of the finished sheet with the depth of groove uniform from side toside.

Referring to the drawings in detail, a. indicates the framework of themachine which carries the ordinary l ourdrinier wire, indicated at isupported on tube rolls 5 Located above the Fourdrinier Wire, and atopposite edges thereof, are the usual deckle straps 0 supported onwheels (Z. The shafts which support the wheels 0? are preferably madeshort, as shown at e, in order that during the operation of the paddlewheels, shown at f, the pulp will be thrown backward onto theFourdrinier wire without striking this shaft, which would be the case ifit extended entirely across. These paddle wheels are rapidly driven bymeans of a suitable motor, as shown at g,pre,ferably' an electric motor.

The free end of the shaft h on which the paddle-wheels f are mounted issuspended from any suitable bracket f or support above the Fourdrinierwire. This suspension device comprises two rods 11 and j provided withright and left-hand threads, and a turn buckle is engaging the threads,whereby the free end of the shaft it may be raised and lowered to efiectan accu' rately horizontal position of the shaft, and also to determinethe depth of the groove in the pulpy mass.

Referring to Fig. 3, in which the Fourdrinier wire is shown at m, andthe soft pulpy mass at 0: p indicates the direction in which the wire istraveling, and q the direction in which the paddle-wheel f is rotated.It will be seen from this figure that during the rotation of thepaddle-wheels, the ends of the blades will cut or scoop out the groovesin the pulp m, as shown at 1', and the removed material will be thrownbackward onto the advancing 'pulpy mass on the wire.

8 indicates a suction box that is located near the wheels 0? for thepurpose of removing a portion of the water in the pulp. This suction boxtherefore serves the purpose of bringing the pulpy mass down to athinner or slightly more solid condition before it is acted upon by thepaddle-wheels f; otherwise the pulp would not remain in a groovedcondition. After the pulp is acted upon by the paddle wheels it passesunder the dandy-roll if in the usual manner, but in order that the edgesof the groove made by the paddle-wheels fmay not be left in a ragged orirregular shape, I place on this roll bands of wire fabric 10,(preferably a little narrower than the width of the paddle-wheels f) sothat the wet pulp is squeezed or pressed into a uniform appearance bymeans of these bands, and yet at the same time leaving the wet papermaterial in a thin condition. After leaving the dandy roll t, the paperstock or material is again acted upon by a second suction-box v and moremoisture is extracted. Beyond this point the construction of the machineis the same as in the ordinary paper making machine.

By means of a turn buckle it is possible to adjust the shaft it so thatone side of the groove 1' may be formed of less depth than the other,while Fig. 4 indicates'that the groove is of uniform depth from one sideto another. The wet paper pulp, after it leaves the suction box '0,passes under the usual press rolls which are generally covered withcloth. The effect of theserolls is to squeeze the pulp or paper stock atthis grooved portion so that the sheet of paper in its finished state isthinned on the opposite side, as shown in Fig. 4 at T That is to say,the press-rolls serve to equally distribute the stock about and onopposite sides to produce a sheet that is equally or nearly grooved tothe same depth on both sides,'as shown in this figure. This isadvantageous as it makes-the sheet uniform as to bending in oppositedirections. The bands to being slightly narrower than the paddles fimpart a clean sharp edge to the groove, thus making it of uniform depthfrom side to side.

It will be seen from this construction that I have produced a device forthinning sheets of paper while in a Wet condition, or in process ofmanufacture, and one that may be economically and rapidly carried outwithout involving expensive changes and improvements in the ordinarypaper making machines.

What I claim, is

1.- In a machine for making sheets of paper with a thin portion having,in combination with the Fourdrinier wire and a dandy roll, a device toremove a portion of the pulp from the wire during the passage of thepaper pulp material through the machine, and means on the dandy-roll forengaging the paper stock at the portions which have been acted upon bysaid device.

2. In a paper making machine, the combination with the Fourdrinier wire,decklestraps and dandy-roll, of a paddle-wheel construction locatedforward of the dandyroll and so placed as to scoop out a groove in thepaper stock during its passage through the machine, and means on thedandy roll for compressing the edges of the groove. 7

3. In a paper making machine, the combination with the Fourdrinier wire,of means for removing a portion of the stock when in a wet condition,and means for adjusting the removing means so as to vary the depth andshape of the groove produced, and means for engaging the edges of thegroove after it leaves the stock-removing means.

4. In a paper making machine, the combination with the Fourdrinier' Wireand suction boxes for removing some of the moisture in the paper stock,of a rotary device located above the Fourdrinier wire for producing agroove or channel in the paper stock during its passage through themachine, means for adjusting the rotary device to vary the depth of thegroove, and a device located on the dandy roll in the rear of the rotarydevice for engaging and compressing the grooved portion of the paper thedandy roll, and a fabric device on the material, whereby a substantiallyuniform roll to engage the grooved portion of the 10 surface isobtained. paper pulp.

5. In a paper making machine the com- 5 bination with the FourdrinierWire, suction RICHARD BENEDICT boxes and dandy-roll, of a device to pro-Witnesses! duce a groove in the paper-pulp and lo- FRANKLIN G. NEAL,

- cated back of one suction box and before HARRY W. BOWEN.

